FUW TRENDS IN SCIENCE & TECHNOLOGY JOURNAL
(A Peer Review Journal)
e–ISSN: 2408–5162; p–ISSN: 2048–5170
keywords: Curcumin, equilibrium, isotherm, kinetic, sorption, metals, thermodynamic, turmeric
The performance of adsorbents, prepared from low cost tumeric for the removal of divalent metal ions was investigated. The adsorbents, coded as chemically modified biosorbent (MTB) and unmodified turmeric biosorbent (UTB) were characterized using Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM). Protocols of batch experiment were followed for profiling several parametric factors. Equilibrium data were modeled using isotherm, kinetic, diffusion and thermodynamic equations. Results shows more developed pore size for the derived adsorbents which in turn presented higher sorption performance. In this study, sorption is best explained with the pseudo-second order model (R2>0.999), following more than one form of transport mode. Sorption process is thermodynamically spontaneous. The positive ΔS° reflected an irregular increase of the randomness at the adsorbent/solution interface. The activation energy (A) values were higher than 42 kJmol−1 indicating chemical reaction-based sorption processes (chemisorption) that also infer claims of the pseudo-second order model. The statistical test, comparing UTB and MTB indicates significant differences (p<0.5) for all the parametric factors. Overall, the study shows that MTB is a potential sorbent candidate for the uptake of divalent metal ions from wastewater, unveiling a removal efficiency of up to 95 % for divalent Cu, 94 % and 99 % Ni ions.
Abd EI-Latif MM, Ibrahim AM & EI-Kady MF 2010. Adsorption equilibrium, kinetics and thermodynamics of methylene blue from aqueous solutions using biopolymer oak sawdust composite. Journal of American Science, 6(6): 267 – 283. Aderonke AO, Abimbola BA, Omotayo SA & Ifeanyi EO 2016. Chitosan-grafted carbon for the sequestration of heavy metals in aqueous solution. Am. Chem. Sci. J., 11(3): 1 – 14. Ahmedna M, Marshall WE & Rao RM 2000. Granular activated carbons from agricultural by–products: preparation properties and application in cane sugar refining. Bulletin of Louisana State Univ. Agric. Centre Res. Extension, 869: 56, http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.506.3232&rep=rep1&type=pdf Amir S, Hafidi M, Merlina G, Hamdi H & Revel JC 2004. Elemental analysis, FTIR, 13CNMR of humic acids from sewage sludge composting. Agronomie, 24: 13–18. Annaraj JP, Ponvel KM & Athappan PR 2004. Synthesis, spectra and redox behaviour of copper (II) complexes of curcumin as models for blue copper proteins, Transition. Met. Chem., 29: 722–727. Araújo MA, Cunha A & Mota M 2004. Enzymatic degradation of starch-based thermoplastic compounds used in prostheses: Identification of the degradeation products in solution. Biomaterials, 25: 2687–2693. Arias F & Sen TK 2009. Removal of zinc metal ion (Zn2+) from its aqueous solution by kaolin clay mineral: A kinetic and equilibrium study. Colloids and Surfaces, A 348: 100–108. Asti M, Ferrari E, Groci S, Atti G, Rubagotti S, Lori M, Capponi C & Zerbini A 2009. Biological activities of rare earth metal complexes with curcumin and 1,10-phenanthroline-5,6-dione. J. Inorg. Biochem., 103: 396–400. Aziza A, Odiakosa A, Nwajei G & Orodu V 2008. Modification and characterization of activated carbon derived from Bumper sawdust and disk sawdust to remove lead(II) and cadmium(II) effluent water. CSN Conference proceeding of the Chemical Society of Nigeria, Deltachem, pp. 235-243.
